TC-508 Owner’s Manual
15
Once any activity is detected, it will jump to the priority channel. For more information, please
consult your dealer.
3. To exit the scanning process, you may
press the Scan key again, or
switch to a channel where the auto scan feature is disabled; or
turn the radio off.
Note:
The Scan Start Alert tone and the Scan End Alert tone can be enabled / disabled by the dealer.
During scanning, the following function keys (if programmed) are available: PTT, Squelch Off ,
Squelch Off Momentary , Monitor and Monitor Momentary.
VOX
This feature allows you to transmit your voice with no need to press the PTT. However, you must employ
a dedicated earpiece to realize this function.
Operation:
1. Set the PTT/VOX Switch on the earpiece to VOX;
2. Plug the earpiece into the accessory jack;
3. Press the programmed VOX key to activate this function.
4. Speak into the microphone (on the earpiece) to transmit your voice, and transmission will stop
automatically when you stop talking;
5. Power the radio off or press the VOX key again to deactivate this function.
Note:
If the PTT/VOX Switch on the earpiece is set to PTT, you can only transmit by pressing the
external PTT, no matter whether VOX is activated.
When the PTT/VOX Switch is set to PTT, you are not allowed to switch it from PTT to VOX
directly; otherwise, continuous transmission may occur. If continuous transmission occurs
unexpectedly, you can restore the radio to normal operation by toggling the switch from VOX to
PTT, or turning the radio off and back on.
You can select an appropriate VOX sensitivity according to the environment. If VOX is activated
under heavy noise, continuously transmission may occur.
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